Mixing apparatus



Fb. 23, 1932. T. w. BARBER 1,846,577

MIXING APARATUS Filed Sept. 1.3, 1928 jv Merz/Laym- TOMQLSI/MZZLlerLBiQ-Zer* @MMU Patented Feb. 23, 1932 UNITED lSTATES THOMASWALTER BARBER, OF LONDON, ENGLAND MIXING APPARATUS Application filedSeptember 13, 192B, Serial No. 305,854, and in Great Britain September30, 1927.

This invention relates to improvements in apparatus for the mixing ofliquids, of gases, or of gases and liquids, and has for its object toobtain an equally intimate admixture under varying conditions of flow.

W hen a gas or liquid (a),-as, for example, an acid-has to be added toanother liquid or gas (b),-as, for example, an oil,- in controlledproportions and in such a manner that an intimate admiXt-ure shall takeplace, it is desirable that the liquid (a),- usually added as arelatively small percentage of liquid (6),-be introduced into in theform of a jet, spray or series of jets or sprays; and that the orificesbe of variable capa-city--while retaining unvaried the finely dividedcharacter of the jets or sprays-so as to accommodate themselves tovariations in flow or pressure or in both.

The apparatus should also be so constructed that it will continue tofunction correctly, even if the passage of the liquids or gases tend toset up conditions which might cause progressive choking of the orifices.It

should also be capable of being easily cleaned.

According to this invention, a vertical sectional view of an apparatusto comply with these conditions is shown in the accompanying drawing,and may be constructed as fol- An external chamber A, preferablycylindrical, is provided to receive at its upper end the liquid or gasand a distributing or injecting device B is disposed within this chamberin such a manner that the gas or liquid (a), as it issues therefrom, isinjected into the liquid (b) as it passes through said chamber.

This distributing device may be constructed as follows A cylindricalbody B,

disposed within chamber A, is bored out to accommodate a pistonl orplunger D. The bore E is provided with orifices C so disposed that theplunger D, in its travel, will progressively open or close a larger orsmaller area of these orifices. These orifices C communicate with thechamber A and insure that the liquid or gas (a) always issues in theform of a jet or spray. j

The plunger D is controlled by a spring F weight, or other equivalentdevice F, so that, when no liquid (a) is flowing, all the orifices C areclosed.

The liquid (a) during its flow, is directed into the bore E and actsagainst one end of the plunger D, which it pushes along the bore until asufficient area of the orifices C is uncovered to pass the quantity ofliquid (a) which is flowing.

If the rate of flow of such liquid (a) is G3 increased, the plunger D ispushed further along the bore E and uncovers a larger area of theorifices. If the rate of feed is decreased, the plunger recedes and thearea of the orifices is proportionately diminished. G5

If the orifices become choked (as is often the case with viscousliquids, or where chemical interactions are concerned), the plungerautomatically takes account of this and is moved by the incoming liquid(a) until the necessary area for discharge is provided.

To facilitate cleaning of the bore E, the plunger may be made in twoparts D and D1 so disposed that, on withdrawal of part D, the part Dlremains in the bore and covers the orices C.

It is, of course, obvious that this apparatus may be used in a seriesand that the liquids to be passed through it may contain matter insolution or suspension.

This invention is not limited to the construction above described, whichis given merely as an example of the manner in which it may be applied.

Having now fully described my invention, what I claim as new and desireto secure by Letters Patent of the United States, is:

l. An apparatus for mixing fluids, comprising two concentric cylindricalmembers dening two chambers, one of said chambers being open to and fedby one of said fluids, and the other being open to and fed by the otherfluid, a cylindrical plunger in the inner of said chambers, said plungerhaving one face in contact with one only of said fluids, and theopposite face in contact only with the other of said fluids, andinjecting orifices in the wall of the inner cylindrical member.

2. An apparatus according to claim l, comico prisng a cylindrical bodyin the inner cylindrical chamber having the same diameter as the plungerand a length suiicient to close all of the orilices When the plunger isWithdrawn from the inner chamber, said body being attachable to saidplunger, and means to limit the displacement of said body.

In testimony whereof I affixmy signature.

THOMAS WALTER BARBER.

